Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering)

The present paper reports the chemical oxidative in situ polymerization technique carried out for preparation of the lead titanate (PbTiO3) doped polyaniline (PANI) composites (PANI/PbTiO3) the ammonium persulphate as oxidising agent. PANI with different weight percentage of PbTiO3 constitutes different PANI-PbTiO3 to know detailed changes. The synthesized samples were analyzed using basic characterization techniques such as X-ray diffraction (XRD) and scanning electron microscopy (SEM). The AC electrical conductivity of the samples was measured using the impedance technique within a frequency range of 1KHz to 1MHz at room temperature and found that 50 wt% shows high conductivity compared to other composites. Additionally, the dc electrical transport property of the composites was investigated within a temperature range of 40-2000C and found that 50 wt% shows high conductivity compared to other composites. The change in electrical resistance of both PANI and PANI/PbTiO3 composites was measured when exposed to 10 %Rh to 90 %Rh. Both samples showed a rapid resistance change upon exposure to humidity, with the PANI/PbTiO3 composite demonstrating higher change in resistance and suitability for humidity sensing compared to PANI.